#ifndef _USART_H_
#define _USART_H_

#include "stm32f10x.h"
void usart_init(void);
void USART1_send(uint8_t data);
u8 USART1_receive(void);
extern uint8_t buf[10];
extern uint8_t len;
extern uint8_t flag;
#endif
